[Haskell-cafe] Spot the difference!
Brandon S. Allbery KF8NH
allbery at ece.cmu.edu
Thu Sep 20 00:18:21 EDT 2007
On Sep 20, 2007, at 0:16 , PR Stanley wrote:
> I must confess that the use of "\_" had me a little confused at
> first but thinking about it I can see that it makes perfect sense
> to have an argument or a wildcard character for any value.
Sure. Remember, arguments are pattern matches in Haskell (the
degenerate case being a variable name which is an irrefutable match
resulting in a lambda binding). As such, it's useful to have a
wildcard pattern which matches irrefutably without binding.
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university KF8NH
More information about the Haskell-Cafe